Предмет:
Английский языкАвтор:
olliehardinDid they go to school yesterday? - Yes, they did. / No, they didn't.
They went to school yesterday, didn't they?
They didn't go to school yesterday, did they?
Who went to school yesterday?
When did they go to school?
Where did they go yesterday?
Why did they go to school yesterday?
How did they get to school yesterday?
Автор:
dud035l1) Did they go to school yesterday? -- Yes, they did. No, they didn't.
2) They went to school yesterday, didn't they?
They didn't go to school yesterday, did they?
3) Who went to school yesterday?
4) When did they go to school?
5) Where did they go yesterday?
6) Why did they go to school yesterday?
How did they get to school yesterday?
Автор:
sariahhobbsДобавить свой ответ
Выразить из формулы V: Gm/R^2=V^2/R
характер оксида и гидроксида:
1) Na
2) K
3) Rb
4) Cs
Предмет:
ХимияАвтор:
josephineuvwbОтветов:
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1.Период колебаний маятника 0.1с. Маятник совершил 20 колебаний. Сколько времени длились колебания? Найдите частоту колебаний.
2.Скорость звука в воздухе 340м/с, а частота колебаний звуковой волны 100Гц. Найдите длину этой волны.
3.Рыболов заметил, что за 5с поплавок совершил на волнах 10 колебаний, а расстояние между соседними гребнями волн 1м. Какова скорость распространения волн?
4.Массу пружинного маятника уменьшили в 4 раза. Во сколько раз изменился период колебаний?
Предмет:
ФизикаАвтор:
lucigarrisonОтветов:
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